#include <bits/stdc++.h>
using namespace std;

#ifdef DEBUG
#define display(x) cerr << #x << " = " << x << endl;
#define eprintf(...) fprintf(stderr, __VA_ARGS__)
#else
#define display(x) {}
#define eprintf(...) do {} while(0)
#endif

template<typename T> bool chmin(T &a, const T &b) { return a > b ? a = b, true : false; }
template<typename T> bool chmax(T &a, const T &b) { return a < b ? a = b, true : false; }
template<typename T>
ostream& operator << (ostream& out, const vector<T> &v) {
    int n = v.size();
    out << "{";
    for(int i = 0; i < n; ++i) {
        if(i) out << ", ";
        out << v[i];
    }
    return out << "}";
}
template<typename A, typename B>
ostream& operator << (ostream& out, const pair<A, B> &v) {
    return out << "(" << v.first << ", " << v.second << ")";
}

typedef long long LL;
typedef pair<int, int> pii;

vector<int> vp = {100, 94, 89, 84, 79, 74, 69, 66, 64, 61, 59};
vector<double> score = {4.3, 4.0, 3.7, 3.3, 3.0, 2.7, 2.3, 2.0, 1.7, 1.0, 0};
double a[101];
double f[5][1000];

int main() {
#ifndef LOCAL
    ios::sync_with_stdio(false);
    cin.tie(0); cout.tie(0);
#endif
    for(int i = 0; i <= 100; ++i) a[i] = 0;
    for(int i = 0; i + 1 < (int)vp.size(); ++i)
        for(int x = vp[i]; x > vp[i + 1]; --x)
            a[x] = score[i];
    for(int i = 0; i < 5; ++i)
        for(int x = 0; x < 1000; ++x) f[i][x] = 0;
    for(int i = 1; i < 5; ++i)
        for(int x = 0; x < 1000; ++x)
            for(int y = 0; y <= x && y <= 100; ++y)
                chmax(f[i][x], f[i - 1][x - y] + a[y]);
    int T; cin >> T;
    while(T--) {
        int x; cin >> x;
        printf("%.1lf\n", f[4][x]);
    }
    return 0;
}